| A | Battery |
| B | Starter |
| D | Ignition/starter switch |
| J207 | Starter inhibitor relay |
| J217 | Automatic gearbox control unit |
| J220 | Motronic control unit |
| S113 | Automatic gearbox control unit |
| S204 | Fuse -1- (30) |
| T2ad | 2-pin connector, black, near alternator, in engine compartment, front right |
| T10 | 10-pin connector, blue, connector point, electronics box, plenum chamber |
| T10a | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T10c | 10-pin connector, green, connector point, electronics box, plenum chamber |
| T10d | 10-pin connector, red, connector point, electronics box, plenum chamber |
| A57 | Connection (30c), in dash panel wiring harness |
| A86 | Connection (50a), in dash panel wiring harness |
| E100 | Connection (multi-function switch), in dash panel wiring harness |
| E109 | Connection (30, central electrics), in dash panel wiring harness |
| F33 | Positive (+) connection (30), in diesel direct injection system wiring harness |
| * | Models with petrol engines |
| ** | Models with diesel engines |
| D | Ignition/starter switch |
| F125 | Multi-function switch |
| J217 | Automatic gearbox control unit |
| K | Diagnosis connection |
| M16 | Reversing light bulb, left |
| M17 | Reversing light bulb, right |
| S6 | Fuse in fuse carrier |
| T6e | 6-pin connector, brown, connector point, electronics box, plenum chamber |
| T10 | 10-pin connector, blue, connector point, electronics box, plenum chamber |
| T10a | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T10m | 10-pin connector, grey, footwell, right, at wheelhouse, behind carpet |
| T10ab | 10-pin connector, black, on gearbox |
| T16a | 16-pin connector, diagnosis connection |
| 102 | Earth connection, in gearbox wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A74 | Connection (15a, fuse 6), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A87 | Connection (RF (reversing light)), in dash panel wiring harness |
| U2 | Connection -1- (15), in automatic gearbox wiring harness |
| * | Models with petrol engines |
| ** | Models with diesel engines |
| F8 | Kick-down switch |
| G93 | Gearbox oil temperature sender |
| J217 | Automatic gearbox control unit |
| N88 | Solenoid valve 1 |
| N89 | Solenoid valve 2 |
| N90 | Solenoid valve 3 |
| N215 | Automatic gearbox pressure control control unit |
| N216 | Automatic gearbox pressure control control unit |
| N217 | Automatic gearbox pressure control control unit |
| N218 | Automatic gearbox pressure control control unit |
| N233 | Automatic gearbox pressure control control unit |
| T10a | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T10b | 10-pin connector, yellow, connector point, electronics box, plenum chamber |
| T16b | 16-pin connector, black, on gearbox |
| 102 | Earth connection, in gearbox wiring harness |
| E105 | Earth connection, in dash panel wiring harness, left |
| E113 | Earth connection, in dash panel wiring harness, right |
| E115 | Earth connection (centre console), in dash panel wiring harness |
| * | Does not apply to diesel engines |
| G182 | Gearbox input speed sender |
| G195 | Gearbox output speed sender |
| J217 | Automatic gearbox control unit |
| J220 | Motronic control unit |
| J248 | Diesel direct injection system control unit |
| T2c | 2-pin connector, black, on gearbox |
| T10d | 10-pin connector, red, connector point, electronics box, plenum chamber |
| T16b | 16-pin connector, black, on gearbox |
| 43 | Earth point, lower part of right A-pillar |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| D159 | Connection (high bus), in engine compartment wiring harness |
| D160 | Connection (low bus), in engine compartment wiring harness |
| E113 | Earth connection, in dash panel wiring harness, right |
| • | CAN bus (data wire) |
| * | Models with petrol engines |
| ** | Models with 3.3 litre diesel engines, AKF |
| F189 | Tiptronic switch |
| J217 | Automatic gearbox control unit |
| J218 | Combi-processor in dash panel insert |
| L19 | Gear selector light bulb |
| L79 | Selector lever illumination |
| L96 | +/- Display illumination (automatic gearbox) |
| N110 | Selector lever lock solenoid |
| T2ae | 2-pin connector, black, in selector lever console |
| T2af | 2-pin connector, yellow, in selector lever console |
| T5f | 5-pin connector, red, in selector lever console |
| T5g | 5-pin connector, black, in selector lever console |
| T10 | 10-pin connector, blue, connector point, electronics box, plenum chamber |
| T10b | 10-pin connector, yellow, connector point, electronics box, plenum chamber |
| T10c | 10-pin connector, green, connector point, electronics box, plenum chamber |
| T10g | 10-pin connector, black, near selector lever console |
| T32b | 32-pin connector, grey, on dash panel insert |
| 102 | Earth connection, in gearbox wiring harness |
| A8 | Positive (+) connection (58d), in dash panel wiring harness (display illumination) |
| E115 | Earth connection (centre console), in dash panel wiring harness |
| * | Models with Tiptronic |
| D | Ignition/starter switch |
| E1 | Lighting switch |
| F | Brake light switch |
| F47 | Cruise control system brake pedal switch (diesel direct injection system) |
| J104 | ABS with EDL control unit |
| J123 | Bulb monitoring device, front |
| M9 | Brake light bulb, left |
| M10 | Brake light bulb, right |
| S3 | Fuse in fuse carrier |
| S9 | Fuse in fuse carrier |
| S10 | Fuse in fuse carrier |
| T14 | 14-pin connector, purple, behind steering column switch trim |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A18 | Connection (54), in dash panel wiring harness |
| A37 | Connection (58a), in dash panel wiring harness |
| B235 | Positive (+) connection -4- (15a), in interior wiring harness |
| E109 | Connection (30, central electrics), in dash panel wiring harness |
| * | Only models with ABS and ESP |
